A tar with taste (4)
I believe the answer is:
salt
This clue is a double definition.
'a tar' is the first definition.
(synonyms)
'taste' is the second definition.
(I know that salt is a type of taste)
'with' is the link.
(Other definitions for salt that I've seen before include "A defence against ice" , "Crystalline substance used to season food" , "Common substance" , "Condiment - old sailor" , "Crystalline substance for the table" .)